Question: Which ketone has the highest minimal lethal dose?
Paraphrase: ketone with the highest minimal lethal dose?
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q170744 . ?ent wdt:P2300 ?obj } ORDER BY DESC(?obj)LIMIT 5 
Answer: acetone, acetone, acetone, acetone, acetone